EP0900830A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ultraviolet fluorescent ink for non-contact ink jet printers
Assignee: Kodak Versamark Inc
•
Filing: 1998-08-28
•
Granted: —
•
Expires: 2018-08-28
Abstract
Abstract An ink jet ink composition comprises a liquid vehicle and a water soluble dye having a fluorescent property. The fluorescent property in this ink jet ink composition comprises a fluorescing brightener and results in an ink which is invisible to the human eye when exposed to normal daylight or incandescent light conditions, yet visible as a fluorescent image when exposed to ultraviolet lighting, and can be used in ink jet printers.
Inventors
- 👤 Bipin G. Bhatt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
An ink jet ink composition comprising a liquid
vehicle and a water soluble dye with a fluorescent
property.
Claim 2
Dependent Claim
18 words
An ink jet ink composition as claimed in claim 1
wherein the fluorescent property comprises a
fluorescing brightener.
Claim 3
Dependent Claim
49 words
An ink jet ink composition as claimed in claim 1
wherein the water soluble dye is selected from the
group consisting of stilbene derivatives, coumarin
and carbostyril compounds, 1,3-Diphenyl-2-Pyrazolines,
naphtalimides; benzazolyl substitution
products of ethylene, phenylethyene, stilbene and
thiophene, combined heteroaromatics with ethylene or
aromatic systems, and mixtures thereof.
Claim 4
Dependent Claim
38 words
An ink jet ink composition as claimed in claim 1
wherein the fluorescent property of the water
soluble dye is present in an amount sufficient to
make the ink jet ink composition invisible except to
ultraviolet light exposure.
Claim 5
Dependent Claim
27 words
An ink jet ink composition as claimed in claim 1
wherein the water soluble dye is present in an
amount up to about 5 percent by weight.
Claim 6
Dependent Claim
28 words
An ink jet ink composition as claimed in claim 1
wherein the water soluble dye is present in an
amount from about 0.5 to 2 percent by weight.
Claim 7
Dependent Claim
33 words
An ink jet ink composition as claimed in claim 1
wherein the liquid vehicle is selected from the
group consisting of a cosolvent, a surfactant, a
wetting agent, deionized water, and mixtures
thereof.
Claim 8
Dependent Claim
24 words
An ink jet ink composition as claimed in claim 1
further comprising a corrosion inhibitor, an
antimicrobial agent, a pH modifier and a humectant.
Claim 9
Dependent Claim
42 words
A process for generating images which comprises
incorporating into an ink jet printing apparatus the
ink composition of claim 1 and forming images by
causing the ink to be expelled in droplets onto a
substrate, thereby generating an image on the
substrate.
Claim 10
Dependent Claim
20 words
A process as claimed in claim 9 wherein the
image is generated by a continuous stream ink jet
printing process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.